JPH10108630A - Lustering coating agent for food having good workability at the time of coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lustering coating agent for food which suppresses the binding of the particles in the coating to each other, forms films having good luster and features good workability. SOLUTION: This coating material is prepd. by dissolving lipid which is liquid at ordinary temp. and dissolves in a solvent at a concn. of 5 to 20w/w% by the solid content weight of the coating agent to a soln. having a concn. of 5 to 20w/w% of the ethanol or/and isopropanol solvent of the coating agent. The coating agent is prepd. by dissolving the lipid described above at the concn. of 10 to 15w/w% in the case of the coating agent consisting of zein and at 10 to 20w/w% in the case of the coating agent consisting of shellac based on the solid content weight of the coating agent into the soln. having the concn. of 10 to 15w/w% of the ethanol or/and isopropanol solvent of the coating agent zein and/or shellac. The lip is liquid fatty acid or/and polyglycerol fatty acid ester. The liquid fatty acid is at least one selected from a group consisting of oleic acid, myristic acid, lauric acid and the fatty acid mixture derived from edible vegetable oils and fats.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a glazing coating agent for food. More specifically, the present invention relates to a glazing coating agent for food, which suppresses binding between particles in a coating and forms a soft and glossy film, that is, has good workability.

[0002]

BACKGROUND OF THE INVENTION Zein is a major component of corn protein and has a unique property of being insoluble in water and soluble in aqueous alcohol. Utilizing this property, it is excellent in water resistance, acid resistance, heat resistance, electric insulation, etc. by coating the surface of the object to be treated by means of spraying, applying, dipping etc. with an alcohol solution in which zein is dissolved. It is known to form a coating. In addition, shellac is obtained by purifying a resinous substance secreted by raccoon scales and has a property of being insoluble in water and soluble in alcohol, and thus is used as a coating agent like zein.

In some food coatings, hot air cannot be used during drying depending on the treatment of the object. In such a case, zein and shellac using alcohol as a solvent for the coating agent have good drying properties.
Better than other coating agents used as aqueous solutions. However, due to the strength of the adhesion of zein and shellac, depending on the type of the workpiece, the workpieces may be mutually settled during the coating operation, resulting in poor workability.

[0004] Shellac is currently mainly used for the glossy coating of foods, for example, confectionery, and the coating of chocolate is performed as follows. The chocolate is charged into a coating apparatus having a rotating pan, the shellac solution is manually added in its entirety, mixed well, and the coating liquid is mixed thoroughly, and the pan is rotated to blow dry. Alternatively, after charging the chocolate, the pan is rotated while being sprayed with a shellac solution, followed by air-drying. In the chocolate coating operation described above, the chocolate particles bind to each other due to the strong adhesion of shellac. The operation must be interrupted in order to loosen the clumps formed by hand, which makes the workability of the coating poor at present.

In general, the following inorganic substances and metal salts of organic acids are often used to prevent the particles from binding during the coating operation, and rarely the other substances are also used. Inorganic substances: talc, hydrous silicon dioxide, light anhydrous silicic acid, synthetic aluminum silicate, kaolin, bentonite, titanium oxide, aluminum oxide, magnesium oxide, calcium phosphate, calcium carbonate, etc. Organic acid metal salts: organic such as calcium stearate, magnesium stearate, etc. Acid alkaline earth metal salts and others: castor oil fatty acid, ricinoleic acid

[0006] Regarding the adhesion prevention, Japanese Patent Publication No. 47-6435 discloses that in a coating using hydroxypropyl cellulose and shellac, an inorganic substance such as talc, titanium oxide, silicon oxide, soft calcium carbonate and dibasic calcium phosphate is used as an antiadhesion agent. Combination is recommended. In JP-A-59-82311, shellac and talc are used together in enteric coating of a drug with a methacrylic acid-methyl methacrylate copolymer to prevent interparticle adhesion. JP-A-63-167747 and JP-A-63-169938 disclose that talc / titanium dioxide is used as a dispersing aid in coating sweetener particles with shellac in order to prevent agglomeration of the sweetener particles during the process.・ Uses aluminum oxide, magnesium oxide, calcium phosphate, calcium carbonate, etc. Further, in Japanese Patent Application Laid-Open No. 61-141882, in coating of vitamin C granules using zein, a powdery polysaccharide is blended to prevent adhesion in addition to reinforcing film formation and controlling elution. However, the purpose of these coatings is moisture-proof, long-lasting, enteric, etc., and when such inorganic substances, organic acid metal salts and powdered polysaccharides are incorporated into the coating agent, polishing, i.e. The gloss is reduced.

Japanese Patent Application Laid-Open No. 50-129725 discloses a method for producing an enteric preparation, which is described as "a method of imparting strong enteric properties to a shellac coating, allowing the particles in the coating to proceed smoothly without mutual bonding. For the purpose of "preventing the aging of the oil", castor oil fatty acid or ricinoleic acid (5 to 30 w / w% based on the weight of shellac) and an antioxidant are added. However, castor oil (oil and fat collected from castor seeds) has a characteristic fatty acid composition (85% or more of ricinoleic acid), and is not suitable for food because it causes diarrhea when eaten.

[0008] In addition to the above patents, there are many patents in which a lipid is used in combination with a coating using zein and shellac, but they are roughly used for two purposes. One is to increase the flexibility, water resistance and strength of the coating, and this is a general method. The other is to prevent binding between particles after coating. The present applicant also discloses in Japanese Patent Application Laid-Open No. 4-79846 that a fatty acid having 12 or more carbon atoms and a melting point of 65 ° C. or less (oleic acid, myristic acid,
Lauric acid, mixed fatty acids derived from edible vegetable oils) alone,
Or a fatty acid and a plasticizer (glycerin, propylene glycol, sorbitan fatty acid ester, shellac, carbon number 8)
10 to 10), which are used in combination as a food coating agent by adding together triglycerides of medium-chain fatty acids, liquid paraffin, and monoglyceride acetate). However, JP-A-4-79846 aims to enhance the transparency, water resistance and extensibility of the coating, and does not aim at the gloss of the coating and the prevention of binding of particles during the coating operation. It is clear that the case differs from the case in the use concentration range of the zein, the amount of the fatty acid added, the addition of the plasticizer alone, and the type of the plasticizer. Further, JP-A-4-
No. 79846 discloses the use of shellac, but does not mainly use shellac as a coating agent, but uses it to change the properties of the coating.

In JP-A-8-34727, the above-mentioned inorganic substance or organic acid metal salt is used to prevent adhesion between soft capsules, and it is recommended to use a lubricant such as solid fatty acid or fatty acid ester in combination. doing. However, this does not incorporate a lubricant into the coating solution but physically adsorbs it after coating. Also, Japanese Patent Application Laid-Open
No. 10746 uses shellac, a fatty acid, a fatty acid ester, or the like as a water-repellent substance in order to prevent adhesion to the throat and the esophagus when taking the medicine during coating.
However, these are intended to prevent adhesion between particles after coating or to prevent adhesion during ingestion, and are not intended to prevent binding between particles during a coating operation and improve workability.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a glossy coating agent for food which suppresses the binding of particles in a coating and forms a glossy film, that is, has good workability. I do.

[0011]

Means for Solving the Problems The present inventors suppress the binding between particles in a coating by blending a lipid which is liquid at room temperature and soluble in a solvent at a specific ratio with a solution of a coating agent. In addition, the present inventors have found that a glossy coating can be formed, that is, a glazing coating for food with good workability can be formed, and the present invention has been completed. As described above, the present applicant disclosed in Japanese Patent Application Laid-Open No. Hei 4-79846 that a fatty acid alone or a combination of a fatty acid and a plasticizer was added to a zein solution as a material for forming a film using zein. , As a food coating agent. However, in the present invention and Japanese Patent Application Laid-Open No. Hei 4-79846, the purpose and the evaluation method are different. Further, JP-A-4-79846
A similar effect was found with the use of shellac as the main coating agent not found in the above item.

[0012] The coating agent is not particularly limited as long as it is a food additive used for coating food, but zein or shellac is the most suitable for achieving the object of the present invention because of the good gloss of the coating. desirable. Zein and shellac are not particularly limited, but it is more preferable that zein be extracted with alcohol and precipitated in almost anhydrous acetone for purification.

As a solvent for dissolving these coating agents, an organic solvent having high solubility of the coating agents and good drying properties is usually used. Among them, ethanol or isopropanol, which has high safety and good gloss of the film after drying, is suitable.
The concentration is 60-90 v / v% when using a conventional zein product as a coating agent, 60-95 v / v% when using zein purified by alcohol extraction and precipitation in almost anhydrous acetone, and shellac. When 100% is used, 100% is desirable, whereby good drying properties and high gloss coating of the film can be obtained.

It is desirable that the dissolution concentration of the coating agent is 5 to 20 w / w%, preferably 10 to 15 w / w%. If the dissolution concentration is less than 5 w / w%, the gloss of the coating after coating deteriorates, and if it exceeds 20 w / w%, the effect of suppressing the binding of particles in the coating decreases.

The lipid which is liquid at normal temperature and soluble in a solvent is
Desirably, it is an edible liquid fatty acid or polyglycerin fatty acid ester. The liquid fatty acids include oleic acid, myristic acid, lauric acid, and mixed fatty acids derived from edible vegetable oils and fats, and the mixed fatty acids derived from edible vegetable oils and fats include, for example, soybean fatty acids and rice bran fatty acids.

The addition concentration of these lipids is 5 to 20% based on the weight of the coating agent dissolved in the solvent, preferably 10 to 15% for zein, and 10 to 20% for shellac.
% Is desirable. If the addition concentration is less than 5%, the effect of suppressing the binding of particles in the coating is reduced,
%, The gloss of the film after coating deteriorates.

As described above, the present invention relates to a method for coating a lipid that is liquid at room temperature and soluble in a solvent with a solution of a coating agent zein or / and shellac in an ethanol or / and isopropanol solvent having a concentration of 10 to 15 w / w%. 10 to 15 w / w when the coating agent is zein with respect to the solid content weight
%, And in the case of shellac, it is dissolved at a concentration of 10 to 20 w / w%, which is a glazing coating agent for food. The object to be treated is not particularly limited as long as it is a food, and examples thereof include spherical, tablet, and granular confectionery (chocolate and the like).

[0018]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which do not limit the scope of the present invention.

Example 1 The following various coating agents were added to a chocolate ball coated with a syrup (0.15% by weight of the chocolate ball as a solid), and the chocolate being dried while being blown at room temperature with a drier while mixing. The binding of the balls and the gloss of the coating after drying were observed. The results are as shown in Tables 1 to 7. Tzein was manufactured by Showa Sangyo Co., Ltd., and shellac was manufactured by Nippon Shellac Co., Ltd.
5E, soybean fatty acids are manufactured by Showa Sangyo Co., Ltd., oleic acid is a first-class reagent manufactured by Wako Pure Chemical Industries, Ltd. Medium-chain fatty acids are coconado MT manufactured by Kao Corporation, and glycerin is a special-grade reagent manufactured by Wako Pure Chemical Industries, Ltd. The glycerin fatty acid ester is Myvaset 9-08 manufactured by Koyo Shokai Co., Ltd., the polyglycerin fatty acid ester is SY Grease Even-ML-500 manufactured by Sakamoto Yakuhin Co., Ltd., and the distilled monoglycerite is Myvaset 9 manufactured by Koyo Shokai Co., Ltd. −
45 were used respectively.

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

[Table 3]

[0023]

[Table 4]

[0024]

[Table 5]

[0025]

[Table 6]

[0026]

[Table 7]

As is clear from the respective tables, in Table 1, the target coating is possible in Test Groups 1 to 3 in which both the gloss of the coating and the suppression of binding during the operation are ◎ or Δ. In Table 2, the target coating is possible in Test Groups 2 to 5 in which both the gloss of the coating film and the suppression of binding during work are ◎ or Δ. In Table 3, the target coating is possible in Test Groups 2 to 5 where both the gloss of the coating and the suppression of binding during the operation are 作業 or Δ. In Table 4, as apparent from the comparison with Table 5, the target coating is possible in Test Groups 2 to 5 where both the gloss of the coating and the suppression of binding during work are ◎ or Δ. In Table 6, in Test Groups 1 to 4 where both the gloss of the coating and the suppression of binding during work are ◎ or Δ,
The desired coating is possible. In Table 7, the target coating is possible in Test Groups 1 to 3 where both the gloss of the coating and the suppression of binding during the operation are 作業 or Δ.

[0028]

According to the present invention, it is possible to provide a glossy coating agent for food which suppresses the binding of particles in the coating and forms a glossy film, that is, has good workability.

Claims (8)

[Claims] 1. A lipid which is liquid at room temperature and is soluble in a solvent is added to a 5-20 w / w% solution of ethanol or / and isopropanol in a solvent of a coating agent in an amount of 5-20 w / w with respect to the solid content of the coating agent. A glazing coating agent for food, which is dissolved at a concentration of 0.1%. 2. An ethanol or / and / or isopropanol solvent 10 for the coating agent zein or / and shellac.
In a solution having a concentration of １５15 w / w%, a lipid which is liquid at room temperature and soluble in a solvent is added to the solution. 2. A solution dissolved at a concentration of 20% w / w.
Polishing agent for food. 3. The glazing coating agent for food according to claim 1, wherein the lipid which is liquid at room temperature and soluble in a solvent is a liquid fatty acid and / or a polyglycerol fatty acid ester. 4. The glazing coating agent for food according to claim 3, wherein the liquid fatty acid is at least one selected from the group consisting of oleic acid, myristic acid, lauric acid and mixed fatty acids derived from edible vegetable oils and fats. 5. The glazing coating agent for food according to claim 4, wherein the mixed fatty acid derived from edible vegetable oils and fats is a soybean fatty acid and / or a rice bran fatty acid. 6. The glazing coating agent for food according to claim 1, wherein the zein is a zein that has been extracted with alcohol and purified by precipitation in almost anhydrous acetone. 7. The glazing coating agent for food according to claim 1, wherein the food is confectionery. 8. The glazing coating agent for food according to claim 7, wherein the confectionery is spherical, tablet-like or granular chocolate.